Furnace for rolling-mills.



Patented May 6, |902.`

- T. v. ALLls,

FURNACE FOR ROLLING MILLS.

(Application led Apr. 20, V1899.)

3 Sheets-Sheet I.

(No Model.)

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WITNESSES No. 699,!27. v Patented May 6, |902.

T. V. ALLIS. FUHNACE FOR ROLLING MILLS.

(Application led Apr. 20, 1899.)

(No Model.) 3 Sheets-Sheet 2.

jm: Nonnls PETERS oo., PHoYaLlmo., WASHINGTON. u. c.

T. V. ALLIS.

FUBNACE FOB ROLLING MILLS.

' (Application filed Apr. 20, 1899.)

(No Model.) 3 Sheets-Sheet`3.

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v UNITED STATES PATENT OEEICE.

THOMAS V. ALLIS, OF BRIDGEPORT, CONNECTICUT.

FURNACE FOJR ROLLING-MILLS.

SPECIFICATIQN forming part of Letters Patent No. 699,127, dated May 6, 1902. Application filed April 20, 1899. Serial No. 713,764. (No model.)

To @ZZ whom it may concern;

Be it known that I, THOMAS V. ALLIS, a cit izen of the UnitedStates, and` ay resident of Bridgeport, in the county of'gFairfeld and State of Connecticut', have invented certain new and useful Improvements' in vFurnaces for Rolling-Mills, of which the' following is a speciiication. I

My invention relates to an improvement in furnaces to be used inconnection with rolling-mills; and it consistsinjan improvement on the devicejshown and'described in a Aformer application filedV by me March 7, 1896, Serial No. 582,169. r

To enable otherstounderstand my invention, reference is hadv tothe accompanying drawings, in .which- Figure 1 representsV a broken upper plan view of thefurnace, showing a'portio'n of the detachable roof, ooigand the interior arrangement of the several'partsof the-furnace beneath the floor. Fig. l2is a broken side ele-v vation of the furnace 'completely roofed in looking in the direction of` arrow dof Fig. 1. Fig. 3 is an upper broken view of the furnace with the roof removed, showing the floor completely coveredwith the several strips or bars to be heated.` Fig.'l4`isj`an`|end elevation of the complete furnace looking in thedirection of arrow b ofFig'. Fig.15'is a transverse section through'line c of Fig. 1. Fig. (i is a broken detail sectionalview of a branch'gaspipe, overlying iron platefbrickwork overlying saidplate, sectional View of one of the special hre-bricks, and side' elevationv of one of the gas-burners. f

Its construction and operationv are as follows: j

1 represents tubular bars or pipes, each of which carries a series of bricks 2, which nnitedly comprise the roof of the furnace. These bricks have holes through them, by

means of which they are strung upon the several bars and are retained there by means ings 5 and6 of the furnace.

the roof,`and thereby decreases theQair-space between the roof and the work to beheated.

Besides, there is an additional advantage in thus supporting the roof-bricks in sections, as it facilitates the instant removal of one burned section and replacing it by a newvone.

7 ,represents the metal sides of the furnace, and 8 represents brackets to which the tierods 9 are attached.

tend up into the bricks 16, which bricks form l' the floor of the combustion-chamber. The upper ,ends of these pipes 14 are provided with a right-angle bend, t'o'which are attached the burners 14, so als to deliver the gas-dame into the recesses 17 of the bricks 16. This arrangement of individual gas-jets plentifully distributed throughout the areafbelow the work-supporting door-bricksv 18 will give in a wide furnace a morel uniform heating-surface than could otherwise be obtained.

The manner of delivering the flame into the recesses or pockets 17`,.against the inclined walls 17a thereof,- insures a much better distribution or diffusion of the heat in the combustion-chamber than could be obtained were thev burners arranged vertically. In each alternate series or rows of the bricks 16 I prefer to alternate'or reverse theposition of the pockets 'and burners. (seeFig.` l) to' still further facilitate Ythe distribution of the heat.

y. Overlying the floor-bricks 18 areplaced at intervals the bearing-bars 19, upon which will rest the bars or metal strips to be heated. 2O

represents interposing blocks to prevent the shifting of the said bearing-bars when the ls trips or bars are introduced intothe furnace.

2l represents stools for sustaining the IOO this, the furnace-floor is first filled with bars orstrips, which are heated to the proper temperature required for rolling. The bar or strip lyingi'n the feedway is then pushed forward by means of an ordinary push bar or rod in the hands of the operator through the throat 42, Figs. 1 and 3, into the reductionrolls. The remaining bars are then shifted laterally toward the feed way,and as fast as one bar is thus broughtinto the feedwayand delivered therefrom through saidthroat 42 it is replaced by the adjoining bar or strip moved into position by the rams 22, and when the last barintroduced into the furnace at the side opposite the feedway has traversed the floor of the furnace and said feedway or deliveryline, it, too, is ready for the rolls. To elfect this, I employ (see Figs. 3 and 5) a series of pusher-bars or rams 22, passing through the openings 23 in the side of the furnace and distributed at intervals proportionate to the length of the furnace and sufficient to move the bars in a straight longitudinal line across the floor.

24 is a shaft mounted in the forked brackets 25, attached to the side of the furnace. The under side of the projecting ends of these pusher-bars are provided with the rack-teeth 22, which teeth register with pinions 26, (see also Fig. 2,) mounted upon the shaft 24.

25 (see also Fig. 4) is a forked bracket which supports the rear end of the shaft 24, and mounted on this shaft is the worm-gear 27, which meshes with the worm 2S on the short shaft 29, carrying the hand-wheel 30. Turning this hand-wheel will therefore rotate the shaft 24 and cause the several pusherbars or rams to advance or recede, as required.

In Fig. 3 the furnace is shown to contain eight bars er strips to be heated and rolled 31, 32, 33, 34, 35, 36, 37, and 3S, which cornpletely cover the floor from side to side, except the narrow openings 39 and 40, provided for the heat to rise from below. When, therefore, the bars have become sufciently heated to be acted upon by the reduction-rolls, which factean be ascertained by simply uncovering any one of the several openings in the rear end of the furnace, which openings are closed by the plugs 41, heated bar or strip 38 is pushed out through the forward opening or throat 42 to the reduction-rolls. (Not shown.)

Immediately upon the delivery of this bar the pushers or rams 22 are moved forward and the remaining bars are shifted, so as to place the bar 37, Fig. 5, into the place recently occupied by the bar 38. The pushers or rams are then withdrawn, and the plug 41 farthest to the right is removed, and a fresh bar is introduced to occupy the position vacated by the bar 3l, and by the time this has traversed the floor of the furnace to the delivery-point it is sufficiently heated to roll. By this means there is no delay in the operation of the reduction-rolls, which when once started can make a continuous run.

Vhile I show the bars in packs, the operation, so far as the shifting mechanism is concerned, is similar to that of solid bars.

43, Fig. 4, is a shelf extending across the rear end of the furnace, and resting on this,

shelf at the extreme right is a wearing-plate 43, over which lthe fresh bars are passed when being introduced into the furnace. In the continuous operation of the furnace the fresh bars will be introduced into the openings covered by the plug 41f; but it will be understood, however, that they may be introduced through any of the other openings.

44 represents vertical projections of the bearing-bars 19, Figs. 1 and 8, resting against the side wall of the furnace, against which projections the bar or strip on the feedingline will bein contact with the throat. These projections will prevent the closing up of the gasopening and are slightly beveled or rounded to facilitate the longitudinal movement of the bar.

The mechanism consisting of gears,sprocket wheels, and sprocket-chains and operated by the handles 45 and 46 (shown at Figs. 3 and 4) for moving the furnace to and from the reduction-rolls is of common and ordinary construction and forms no part of my present invention. The two handles 45 and 46 are simply intended for two men for controlling the movement of the furnace.

IVhile I show certain mechanism for controlling the operation of the pusher-bars or rams, I do not Wish to be confined strictly thereto, as it is quite evident that such mechanism can be changed to conform to the style of the furnace and the convenience of the operator. An essential feature, however, in connection with the pushers or rams for shoving the bars across the floor are the openings in the side of the furnace for the admission of the said pushers or rams. While I show that said pushers or rams retreat to the inner face of the side wall of the furnace, it will be understood that they can be withdrawn entirely from the furnace, if desired.

)Vhile I show one side or wall of the pockets or recesses 17 inclined, I do not wish to b'e strictly confined to this feature, as the principal object of these pockets is to catch and hold the falling dirt or dust, and thus prevent clogging the burners. For this purpose the burners discharge at right angles to the walls of saidpockets,and the bottoms of said pockets are below the mouth of the burners.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, isf 1. A furnace of the character described provided with a combustion-chamber located beneath the work-supporting Hoor; bricks comprising the floor of said chamber constructed with pockets or recesses opening into said combustion-chamber; an opening in one of the side walls of the pockets, and pipes communicating therewith and with a gas-supply, for the purpose set forth.

2. Afurnace of the charaeterdescribed provided with a combustion-chamber; bricks comprising the floor of said chamber provided with pockets or recesses opening into said combustion-chamber, and having one of their 'flame above the bottoms of said pockets or recesses, for the `purpose setv forth.

l4. The combination, in a furnace of the character. described having a combustionchamber, and floor.- bricks therefor having pockets or recesses opening` into said chamber, of a gas-receiver and a series of gas-distributing conveyers placed below said floor-bricks, and pipes connecting said conveyers With the pockets of said Hoor-bricks, for projecting flame into said pockets or recesses, for the y purpose set forth.

Signed at Bridgeport, in the county of Fairfield and State of'Connecticut, this 19th day of April, A. D. 1899.

THOMAS V. ALLIS.

Vitnesses:

SIG. DORMITZER, F. A. FAIRCHILD. 

